An element.
Any substance that cannot be broken down into simpler substances is an?
If an unknown substance cannot be broken down into simpler substances it is made of one kind of atom and an element.
Its Elements
Elements are substances that coonono be broken down in a garbage disposal.
An element is a pure substance that cannot be broken down into simpler substances by chemical means.
Elements
If the above didn't answer your question, a substance that can be broken down into simpler substances is called a compound. Even the simplest compounds can be broken down into individual elements.
Not: atoms The answer is an element
yes it is true
This change is possible.
cannot be broken down into simpler substances by chemical means
All of the elements of the periodic table cannot be broken down into simpler substances.